What is Artificial Intelligence?

Before we get on with the topic let me introduce myself!! Coz the reason you are here might be because you want to jump onto the AI bandwagon to make a carrier out it. My story, though incomplete, may encourage you to hop on or may persuade you to pursue some other stuff. I never was hard working, but always had interest in highly technical stuff. In my high-school or college I was interested in physics. I studied graduate level physics in high-school itself.